What should I do if the description file failed to install and is no longer valid?

What should I do if the description file failed to install and is no longer valid?

Solution to failed installation of iphone description file

Settings → Pass → Pull to the bottom of the Pass interface → Trusted files or device management will appear.

1 Generally, you need to use a description file after installing the software normally before trusting the application. Let’s do it together! First enter the settings interface of your Apple phone.

2 In the settings interface, find General and enter the General interface.

3 Pull the interface to the bottom, and either the trust file or device management will appear.

4 After the mobile phone is upgraded, it is device management. Click on device management to see enterprise-level applications.

5 Click on the enterprise-level application "Beijing DongFen Technology" and you can see that you trust this application. Since the software is already trusted, what is shown here is to delete the application.

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